When you see a green ring around an egg yolk, it’s a sign that…

And yes, for smoother peeling, crack and peel them under running water.

If you want to prevent cracking while boiling them, add a tablespoon of vinegar or a pinch of salt in the water.

Boiled unpeeled eggs are safe to eat in a week time, while the peeled ones can be stored for 2 to 3 days before consuming.